Steam-hammer



Patented June'll, 1889.

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ITI/newton (No Model.)

J.H. 1BLA'KE. STEAM' HAMMER.

winesses N4 PETERS, Phololilhogrzphor. Washinginn. D. C.

UNITED STATES- PATENT UEEICE.

JOHN H. BLAKE, OF DEERING, MAINE.

STEAM-HAMMER.

SPECIFICATION forming part of Letters Patent No. 405,072, dated .Tune11, 1889.

Application filed March 9, 1889.

To @ZZ whom, t may concern:

Be it known that I, JOHN II. BLAKE, of Deering, in the county ofCumberland and State of Maine, have invented certain new and usefulImprovements in Steam-Hammers; and I do hereby declare that thefollowing is a full, clear, and exact description of the invention,which will enable others skilled in the art to which it appertains tomake and use the same, reference being had to the accompanying drawings,and to letters of reference marked thereon, which form a part of thisspecification.

My invention relates to improvements in steam-hammers, and pertains moreespecially to mechanism for regulating the operation of the valve in thesteam-chest, for regulating the supply of steam on top of the piston andthereby the force of the blow, and for preventing the breaking of thebed-plate.

In the drawings herewith accompanying, Figure l is a side elevation ofmy improved hammer, certain parts being removed; Fig'. 2,-

a cross-section of Fig. l on line l l. Figs. 3 and 4 are details showingnut-lock, and same letters refer to like parts,

The helve a is mounted on a trunnion c, either directly or in a husk orsleeve awhich is mounted on the trunnion. The trunnion c is journaled inthe standards bgupon the bedplate Z). Upon thebed-plate at the end isthe anvil f, and over the anvil and attached to the helve is the hammerpropere. The block g, behind the standards b2, serves to limit theupward movements of the hammer.

In front of the standards and beneath the helve is a cylinder t, havingpiston d and piston-rod c. The piston-rod is connected with thecross-head b, and said cross-head is attached to the helve or husk, asseen in Fig. 2. At the side of the cylinder is a steam-chest u, in whichis valve x and valve-stem w. From the steam-chest ports y and z leadinto the cylinder, port y above the piston and port 5 below. Thesteam-chest has also-the supply-pipe o and the exhaust s. The valvestemw extends upwardly, passing through the vertical hole n in the block o',and has the horizontal slot p and the bolt e passing through stem andslot p. The block o has a horizontal groove f. In groove fdruns ahorizontal slide p, having therein a slot r.

Serial No. 302,696. (No model.)

The slide p passes through the slot p in the stem fw, and the bolt epasses through the slot r in the slide, as seen in Fig. The slot r ishorizontal at each end and inclined in the middle. In the end of slide pis a slot q. Attached to slide p by a bolt free to move up and down inslot q isl a lever o. The lever o is pivoted at its lower end on a rodn, having the arm m. Pivoted to the end of the arm 'In is an upright rodh, with a screw-thread cut on its upper end. An arm d is rigidlyattached to the trunnion c, having on its outer end a pivoted clasp z',through which the vertical rod h passes. On the rod 71, is a nut j abovethe clasp and a nut Z below said clasp. The nut la below the claspshould have a nutlock to hold it securely in any given position. Thislock may have the form shown in Figs. 3 and 4t, in which o" is a groovein the rod, k the nut, Z the lock having linger Z adapted to entergroove i', and j a spring constantly tending' to hold the iingerclutched in the groove o". Vhen the bed-plate is made solid, it requiresa great amount of metal to prevent it from breaking. In order to securelightness combined with strength, I make the bedplate with one or morehollow places h', extending longitudinally, as shown in Fig. 2.

My invention having now been fully described, I will proceed to explainits operation.

The hammer being in the position shown in Fig. l, the steam enters thesteam-chest, passes through port into the cylinder, and forces thepiston upward, the piston-rod driving the hammer upward until it reachesthe position shown by dotted lines in Fig. 1. The upward movement of thehammer turning on the trunnion c raises arm d, and with it the rod 7L,an d thus throws forward the lever o and the slide .p through slot f inblock o. The inclined slot r, in which bolt c of the valvestem runs,raises the said stem and the valve cc the distance between the twohorizontal ends of the slot r, which distance should be just sufficientto open and shut the ports y and .e alternately. This means ofoperating' the valve c prevents any strain onthe valve, and alsoprevents the valve from getting too far below or too far above theports, because as soon as the hammer is raised sufficiently to open theports the valve ceases to rise, in-

IOO

asmuch as the end of slot fr is horizontal. In order to regulate thedownward blow of the hammer, I introduce into the port y, through whichsteam enters the cylinder on top of the piston, a shut-ofi valve a2,which should be adapted to shut oit the port f z/ gradually to anydesired extent. The form or shape of valve a2 is not essential so long`as it will Vclose to a greater or less extent, as desired, the port y.To regula-te the length of each stroke of the hammer, I place nutsj and7u the one above and the other below the clasp 'L' on rod L.

IIavin g thus described my invention and its use, what I claim, anddesire to secure by Letters Patent of the United States, is

l. In a steam belve-hammer having a bedplate and supporting-standards, abelve-hainnier mounted on a trunnion journaled. in said standards, astean'i-cylinder with piston and piston-rod, a cross-head connectingpiston-rod and helve, a steam-chest with ports opening into the cylinderone above thc other below the piston, a valve adapted to open and closethe ports alternately, and a valve-stem adapted to move up and down in astem-hole in a fixed block, said stein having a vertical slot therein,the combinatioinwith said stem,oi` a horizontal slide moving in saidblock and passing through the slot in the valve-stem, said slide havinga slot therein, as described,

to operate the valve, a lever attached to said slide, and a vertical rodattached to an arm on the lever, said rod being operated by an armrigidly fixed on the trunnion, all substantially as and for the purposeshereinbe'tore set forth.

2. In a steam -hammer having cylinder` piston, piston rod, cross -headconnecting helve and piston-rod, a steanrchest with ports opening oneabove the piston the other below, a valve adapted to open and close saidports alternately, a valve-stem running in a lixed block 0, asdescribed, the combination, with horizontal slide j), having. slot r,lever o, attached to slide p in slot q, rigid arm m, attached to levero, vertical. rod 7L, attached to arm m and having a screw-thread at thetop, and arm (l, rigidly set on trunnion c and having the pivoted claspi', of nuts j and It, the one above the other below the clasp t,substantially as and for the purposes hcrcinbefore set iorth.

In testimony that I claim the foregoing as my own I affix my signaturein presence of two witnesses.

JOHN ll. BLAKE.

lVitncsses:

LEVI O, VERRILL, ELGIN C. VERRILL.

